Redskins' Snyder
Wins Three Seats
On Six Flags Board

Washington Redskins owner Daniel Snyder prevailed in his attempt to wrest three board seats from theme-park operator Six Flags Inc., giving him a mandate to take control of the company.

Stockholders representing in excess of 57% of Six Flags' shares outstanding support the Snyder-led plan to remove three of the company's seven board members, including its chief executive and chairman. Barring dissent from the remaining board members, Mr. Snyder is expected to assume the chairman's role, with former ESPN executive Mark...